引导表语从句的先行词
常见的表语从句引导词总共有五类，连词that，whether，连接代词，连接副词，和关系代词what 一.that 当that引导表语从句时，只起连接作用，不在表语从句中充当任何句子成分,但通常不省略，除了在部分口语句子中。 如： The fact is that he doesn’t really try. The trouble is (that) he is ill. The reason why he didn't come wasthat he missed the...